/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package Controller;

import Model.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import static java.nio.charset.StandardCharsets.UTF_8;
import java.util.Hashtable;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author bienphongvnn
 */
@WebServlet(name = "Login", urlPatterns = {"/Login"})
public class Login extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String TITLE = "ĐĂNG NHẬP";
            String CONTENT = "";
            StringWriter content = new StringWriter();
            HttpSession session = request.getSession();
            if(request.getParameter("email") != null) {
                String email = request.getParameter("email");
                String pass = request.getParameter("password");
                checkLogin db = new checkLogin();
                if (db.checkUser(email, pass)) {
                    synchronized(session){
                        session.setAttribute("ISLOGIN", true);
                        session.setAttribute("EMAIL", email);
                    }
                }      
                else{
                     content.append("Đăng nhập thất bại. Vui lòng đăng nhập lại !!!<br/>");
                }
            }     
            Object ob = session.getAttribute("ISLOGIN");
            Object tenhienthi = session.getAttribute("EMAIL");
            Boolean isLogin = true;
            if(ob == null || (Boolean)ob == false)
                isLogin = false;
            if(isLogin) {
                content.append("Chào mừng "+ tenhienthi.toString() + " Bạn đã đăng nhập thành công.<br/>");
                content.append("Click vào  <a href='TrangChu'>đây</a> để quay về trang chủ !");
            }
            else
            {
                    response.sendRedirect("DangNhap.jsp");
            }
            content.close();            
            CONTENT = content.toString();
            /**
             * Xuất nội dung với một template cho sẵn
             */
            Hashtable<String, String> data = new Hashtable<String, String>();
            data.put("TITLE", TITLE);
            data.put("CONTENT", CONTENT);
            
            String viewPath = "/View/template.html";
            String absolutepath = getServletContext().getRealPath(viewPath);
            String webcontent = MyUltilities.readFile(absolutepath, UTF_8);
            webcontent = MyUltilities.replace(data, webcontent);
            out.println(webcontent);
            
            
            
//            out.println("<!DOCTYPE html>");
//            out.println("<html>");
//            out.println("<head>");
//            out.println("<title>Servlet Login</title>");            
//            out.println("</head>");
//            out.println("<body>");
//            out.println("<h1>Servlet Login at " + request.getContextPath() + "</h1>");
//            out.println("</body>");
//            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        processRequest(request, response);
//        String email = request.getParameter("email");
//        String password = request.getParameter("password");
//        Connect db = new Connect();
//        if(db.checkUser(email, password)){
////            RequestDispatcher dispatcher = request.getRequestDispatcher("TrangChu");
////            dispatcher.forward(request, response);
//            response.sendRedirect("TrangChu");
//        }
//        else{
//            response.sendRedirect("DangNhap.jsp");
//        }
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
